Draft device and flue-cleaner.



L. H. HATFIELD.

DRAFT DEVICE AND FLUE CLEANER. APPLICATION FILED MAR. 20, 915..

1 177,5 1 5. Patented Mar. 28., 1916.

V w /7 6 1 M 1% J L j I T \L a? t. 9 i J x Q DRAFT :onvioii Kiwi)Flinn-CLEANER.

Specification of Letters Patent.

Patented Mar. 28, 1916.

Application filed March 20, 1915. Serial No. 15,947.

To all whom it may concern:

Be it known that I, LOUIS ,H. HATFIELD, a citizen of the United States,residing at Newark, in the county of Licking and State of Ohio, haveinvented new and useful Improvements in Draft Devices and Flue-Cleaners, of which the following is a specification.

This invention relates to draft devices and flue cleaning appliances forsteam boilers.

The invention has for its object to produce a device of simple andimproved construction whereby exhaust steam may be utilized for thepurpose of increasing the draft in boiler furnaces and at the sametimekeep' the fines and the smoke box clean and free from accumulationsof soot and ashes.

A further object of the invention is to produce a device of thecharacter described which will be simple in construction, eflicient inoperation, and which may be easily and quickly installed in ordinarytypes of boilers.

With these and other ends in view which will readily appear as thenature of the invention isbetter understood, the same consists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claim.

In the accompanying drawing has been illustrated a simple and preferredform of the invention, it being, however, understood that no limitationis necessarily made to the precise structural details therein exhibited,but that changes, alterations and modifications within the scope of theclaim may be resorted to when desired.

In the drawing'Figure 1 is a sectional view taken longitudinally througha portion of a steam boiler equipped with the invention. Fig. 2 is atransverse sectional view taken on the line 22 in Fig. 1.

Corresponding parts in both figures of the drawing are denoted by likecharacters of reference.

The boiler casing is shown at 15, and the times are shown at 16, saidflues opening into the smoke box'17 with which the lower end of thesmoke stack 18 communicates. Within the smoke box is arranged aninverted funnel 19, the nozzle of which, 20, extends up wardly in thedirection of the smoke stack.- The bell of thefunnel 19 is supported bymeans of legs or props 21 whereby it is elevated from the floor of thesmoke box, the lower end portion of said bell being curved andconcentric with the curvature of the smoke box so as to be equallyspaced from the bottom portion and said smoke box. A pipe or duct 22serves to convey the exhaust steam from the cylinders. not shown, saidpipe being guided within the smoke box below the bell of the funnel 19and provided with a discharge nozzle 23 which extends upwardly withinthe bell to discharge the steam into the nozzle of the funnel.

'24.- designates the manhole cover of the smoke box.

The steam pipe 22 may be provided with a valve 24. p

When the manhole cover is closed and exhaust steam is admitted throughthe pine 22 and nozzle '23. a partial vacuum will be created within thebell of the funnel, thereby I5 producing a suction-whereby the soot andY ashes in thebottom of the smoke box, as well as that contained in theflues 16. will be forced to travel through the bell of the funnel 19 andupwardly through the nozzle 20 into the smoke/stack through which theobstructions will be ejected.

The curvature of the lower end portion of the funnel 19 enables it to beplaced closely adjacent to the bottom portion of the smoke box. coveringa large area and thereby rendering the operation of the device moreeifi-' cient.

Having thus described the invention, what is claimed as new, is V Incombination with a steam boiler having a smoke box, a nozzle disposed inthe smoke box. and an exhaust steam pine connected with said nozzle, ofan inverted funnel surrounding said nozzle within the smoke box andhaving its bottom peripheral edge curved concentrically with thecurvature of the and the neck of the funnel in spaced relation:

peripheral Wall of the smoke box adjacent With the mouthof the nozzle.101

said nozzle, and supportinglegs carried by In testimony whereof I aflixmy signature said funnel and contacting With the bottom inpresence oftWo Witnesses.

5 peripheral Wall of the smoke chamber adj a- LOUIS H. HATFIELD.

cent said nozzle whereby, the bottom, pe- Witnesses: nriphera'lecl-ge'of the-funnel is held "in spaced ELIzABETHl;M2iS cH}IcK,relation with the bottom of thesmoke box ORPHA A. GAITHER.

